Bed for zinc printing-plates



E. JAEGK. BED FOR ZINC PRINTING PLATES.

Patented Mar. 18, 1-890.

(No Model.)

' Jzvvmran ATTORNEYS? pl I!!! I l i I N. PETERS. Phoh-Lmwgnp mr,Wunmgton, D. G.

' To all whom it may concern:

UNITED STATES;

PATENT OFFICE.

EMILE JAEOK, OFBROOKLYN, NEW YORK...

BED FOR ZlNCPRINTlNG-PLATES.

SPECIFICATION formingpart of Letters Patent No. 423,691, dated March 18,1890.

Application filed November 15, 1889. Serial No. 330,400. (No model.) 7

Be it known that I, EMILE J AECK, of Brookl yn,in the county of Kingsand State of New York,,a citizen of the United States, have in-- ventedcertain new and useful Improvements in Beds for Zinc Printing-Plates, ofwhic the following is a specification.

This invention relates to improvements in beds for holding andsupporting zinc plates used in the art of lithography.

The object of my invention is to provide a new and improved bed on whichthe zinc v plate can be held securely and stretched so em in section online 2 2, Fig. 1.

as to fit snugly on the top-of the bed.

The invention consists in the construction and combination of parts anddetails, as will be fully described and set forth herein-after, andpointed out in the claims,

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional. elevation of my improved zinc bed. Fig. 2 is a plan View D.The other end of thezincplate is passed over aroller E, mounted to turnin a groove in the front edge of the bed, and is clamped between twoplates G and H by means of screws J, which plates are arranged at thefront of the bed and are provided with guidepins K, passing throughvertical slots L in the front of the bed and provided at their innerends with heads L which heads prevent the plates from being moved fromthe front of the bed, or tilting. The plate H is provided at each endwith alateral projection or wing M, and above the same the bed A isprovided with an upright cylindrical bracket N, in which a screw 0 ismounted to turn, said screw having a square or other suitable upper end.After the zinc sheet B hasbeen securely clamped between the plates G andH the" screws 0 are turned so as to exert downward pressure on'the wingsM, thereby drawing the plates G and H downward, whereby the zinc sheetis stretched snugly over the top of the base A. The sheets can beapplied easily and rapidly, and when they are to be detached can easilybe released and removed.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a bed for zinc plates,.the combination, with abase-plate or bed, of clamping-plates guided on one of thesides of thebase to move vertically, one of said clamping-plates being provided withend win gs, bracketson the'baseplate above said wings, and screws insaid brackets, substantially as set forth. 7 2. The combination, with abase-plate having vertical slots in its: sides, of clamping platesarranged adjacent to said verticallyslotted side, headed gui'de-pinsprojectingfrom my invention I have signed myname inpresence of twosubscribing witnesses.-

EMILE J AEOK.

WV-itnesses:

OSCAR F. GUNZ, JOHN A. STRALEY.

